ML20212F491
| ML20212F491 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 10/30/1997 |
| From: | Katz P BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9711040297 | |
| Download: ML20212F491 (2) | |
Text
Calvert Cliffs Nuclear Power Plant l
Plant General Manager Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410 495-4101 October 30,1997 U. S. Naclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk SUILIECT:
Calvert Cliffs Nuclear Power Plant Unit No.1; Docket Nos. 50 317 Eire Detection Instrumentation Special Reoort The attached special report is submitted in accordance with Calvert Cliffs Unit i Technical Specification 3.3.3.7. This report concerns the inoperability of the Unit 1 Service Water Room Fire Detection instrumentation for a period in excess of 14 days.
Should you have questions regarding this matter, we will be pleased to discuss them with you.
Very tru y yours,
/ m/
PEK/RCG/bjd
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Attachment cc:
R. S. Fleishman, Esquire
- 11. J. Miller, NRC J. E. Silberg, Esquire Resident Inspector, NRC Director, Project Directorate 1 1, NRC R.1. McLean, DNR I
A. W. Dromerick, NRC J. II. Walter, PSC l
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A'ITACIIMENT (1)
UNIT I FIRE DETECTION INSTRUMENTATION SPECIAL REPORT Baltimore Oas and Electric Company submits this special report concerning inoperable Fire Detection Instrumentation as required by Technical Specification 3.3.3.7, Action (b). Specifically, the Unit 1 Service Water Room Fire Detection Instmmentation was inoperable for greater than 14 days, requiring
-issuance of this special report.
ACTION TAKEN After the Fire Detection Instrumentation for the Unit 1 Service Water Room was removed from service, the Unit i Technical Specification 3.3.3.7, Action (a) wus implemented. This Action requires, in part, that with one or more of the fire detection instrument (s) shown in Table 3.3-11 inoperable, then within one hour establish a fire watch patrol to inspect the zone (s) with the inoperable instrument (s) at least once per hour; or within one hour and at least per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, inspect the zone (s) with inoperable instruments and verify that the Automatic Sprinkler System, including the water flow alarm and supervisory system, is OPERABLE by Channel Functional Test.
CAUSE OF INOPERABILITY On September 30,1997, the Unit i Service Water Room Fire Detection Ir.strumentation was removed from service to support a modification to the service water heat exchangers. The modification included welding activities. The 3moke frota welding activities can actuate the Fire Detection Instrumentation resulting in a hanging fire alarm in the Centrol Room. To prevent this alarm, an approved temporary alteration was installed that removed the Unit 1 Service Water Room Fire Detection Instrumentation from service.
PLANS AND SCllEDULE FOR RFSTORING TIIE INSTRUMENTATION TO OPERABLE STATUS The Unit 1 Service Water Room Fire Detection Instrumentation will be restored to OPERABLE status when the modification welding work is completed. This work is currently planned to be completed by December 5,1997. In accordance with Technical Specification 3.3.3.7. Action (a), compensatory actions will remain in effect until the Unit 1 Service Water Room Fire Detection Instrumentation is restored to OPERABLE status.
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